Wash, peel and chop the bottle gourd. If the seeds are hard then discard them.
Next take oil in a frying pan and heat it. Add in 1/2 tsp mustard seeds, 1 tsp urad dal and 1 tsp chana dal.
When the mustard seeds splutters and urad dal turns brown, add in asafoetida, turmeric powder, broken red chili and curry leaves.
Next add in chopped bottle gourd. Give a quick mix. Please note, you can pressure cook the bottle gourd before adding to save fuel.
Add in salt and jaggery.
Add 1/4 cup of water and bring it to boil.
When it starts boiling reduce the flame, close the lid and cook until soft.
Stir in between and cook until soft under low flame. If the bottle gourd is tender, it will get cooked fast.
Meantime dry grind grated coconut, rasam powder (or red chilies), curry leaves (optional) and 1/2 tsp of mustard seeds using a small mixie jar.
Add in ground masala. Give a quick stir.
Add in coriander leaves and mix well for a minute.
Switch off the stove. Add in lemon juice (optional) and serve it with hot steaming rice or chapathi.